我怎么能火UpdateQuery在SQLite数据库

这里是我的Mainactvity我怎么能火UpdateQuery在SQLite数据库

 DataBaseHelper myDb; 
     TextView roti, bread, biscuit, egg, dosa, fruits; 
     TextView groti, gbread, gbiscuit, gegg, gdosa, gfruite; 
     TextView used1, used2, used3, used4, used5, used6; 
     Spinner spinner, spinner2; 
     String[] listofitem = {"Roti", "Bread", "Biscuit", "Egg", "Dosa", "Fruits" 
     }; 
     String[] value = {"Select", "1", "2"}; 
     protected static TextView dispalycuerrentdate; 
     protected static TextView dispalycuerrenttime; 
     //for spinner string 
     String item, quantity; 
     Button submit; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 
      //TEXVIEW INITIALIZER 
      submit = (Button) findViewById(R.id.submitbutton); 
      roti = (TextView) findViewById(R.id.roti); 
      bread = (TextView) findViewById(R.id.bread); 
      biscuit = (TextView) findViewById(R.id.biscuit); 
      egg = (TextView) findViewById(R.id.egg); 
      dosa = (TextView) findViewById(R.id.dosa); 
      fruits = (TextView) findViewById(R.id.fruits); 
      groti = (TextView) findViewById(R.id.groti); 
      gbread = (TextView) findViewById(R.id.qbread); 
      gbiscuit = (TextView) findViewById(R.id.gbiscuit); 
      gegg = (TextView) findViewById(R.id.qegg); 
      gdosa = (TextView) findViewById(R.id.qdosa); 
      gfruite = (TextView) findViewById(R.id.gfruits); 
      used1 = (TextView) findViewById(R.id.used1); 
      used2 = (TextView) findViewById(R.id.used2); 
      used3 = (TextView) findViewById(R.id.used3); 
      used4 = (TextView) findViewById(R.id.used4); 
      used5 = (TextView) findViewById(R.id.used5); 
      used6 = (TextView) findViewById(R.id.used6); 
      //Spinner Initializer 
      spinner = (Spinner) findViewById(R.id.Spinner1); 
      spinner2 = (Spinner) findViewById(R.id.Spinner2); 
    //Initializing db 
      myDb = new DataBaseHelper(this); 
      ArrayAdapter adapter = ArrayAdapter.createFromResource(this, R.array.mtype, android.R.layout.simple_selectable_list_item); 
      spinner.setAdapter(adapter); 
      ArrayAdapter adapterr = ArrayAdapter.createFromResource(this, R.array.mmtype, android.R.layout.simple_selectable_list_item); 
      spinner.setAdapter(adapter); 
      spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
       @Override 
       public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
        item = parent.getSelectedItem().toString(); 
        Log.e("String", item); 


       } 

       @Override 
       public void onNothingSelected(AdapterView<?> parent) { 

       } 
      }); 
      spinner2.setAdapter(adapterr); 
      spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
       @Override 
       public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
        quantity = parent.getSelectedItem().toString(); 

       } 

       @Override 
       public void onNothingSelected(AdapterView<?> parent) { 

       } 
      }); 
      //Date and time Picker 
      dispalycuerrentdate = (TextView) findViewById(R.id.date); 
      Button displayTimeButton = (Button) findViewById(R.id.select_time); 
      assert displayTimeButton != null; 
      displayTimeButton.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        DatePickerFragment datePickerFragment = new DatePickerFragment(); 
        datePickerFragment.show(getFragmentManager(), "Select"); 
       } 
      }); 

    //for time 
      dispalycuerrenttime = (TextView) findViewById(R.id.timeee); 
      Button displayTimeButtonn = (Button) findViewById(R.id.select_timee); 
      assert displayTimeButtonn != null; 
      displayTimeButtonn.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        TimePicker mTimePicker = new TimePicker(); 
        mTimePicker.show(getFragmentManager(), "Select time"); 
       } 
      }); 

      //Button click 

      submit.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        insertintodb(); 
        // Updateintodb(); 
        Toast.makeText(MainActivity.this, "ITEm:-" + item + "Quantity:-" + quantity, Toast.LENGTH_SHORT).show(); 
       } 
      }); 


     } 

     public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener { 
      @Override 
      public Dialog onCreateDialog(Bundle savedInstanceState) { 
       final Calendar c = Calendar.getInstance(); 
       int year = c.get(Calendar.YEAR); 
       int month = c.get(Calendar.MONTH); 
       int day = c.get(Calendar.DAY_OF_MONTH); 
       return new DatePickerDialog(getActivity(), this, year, month, day); 
      } 

      public void onDateSet(DatePicker view, int year, int month, int day) { 
       dispalycuerrentdate.setText("" + String.valueOf(year) + "/" + String.valueOf(month) + "/" + String.valueOf(day)); 
      } 
     } 

     public static class TimePicker extends DialogFragment implements TimePickerDialog.OnTimeSetListener { 
      @Override 
      public Dialog onCreateDialog(Bundle savedInstanceState) { 
       final Calendar c = Calendar.getInstance(); 
       int hour = c.get(Calendar.HOUR_OF_DAY); 
       int minute = c.get(Calendar.MINUTE); 
       return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity())); 
      } 

      @Override 
      public void onTimeSet(android.widget.TimePicker view, int hourOfDay, int minute) { 
       dispalycuerrenttime.setText(" " + String.valueOf(hourOfDay) + " : " + String.valueOf(minute)); 
      } 
     } 

     public void insertintodb() { 
      ContentValues insertvalue = new ContentValues(); 
      Log.e("INSERTVALUE", insertvalue.toString()); 
      insertvalue.put(myDb.ITEM, item.toString()); 
      insertvalue.put(myDb.MAX, 2); 
      insertvalue.put(myDb.USED, quantity.toString()); 
      insertvalue.put(myDb.DATE, String.valueOf(dispalycuerrentdate)); 
      insertvalue.put(myDb.TIME, String.valueOf(dispalycuerrenttime)); 
      myDb.db.insert(myDb.TABLE_NAME, null, insertvalue); 
     } 

     // public int Updateintodb(String oldvalue, String newUsed) { 
    ////UPDATE "main"."fOOD_dIARY" SET "Used" = ?1 WHERE "ID" = 2 
    //  ContentValues contentValues = new ContentValues(); 
    //  contentValues.put(myDb.USED, newUsed); 
    //  String[] where = {oldvalue}; 
    //  int count = myDb.db.update(myDb.TABLE_NAME, contentValues, myDb.USED + " =? ", where); 
    //  Log.e("COUNT",String.valueOf(count)); 
    //  return count; 
    // 
    // } 
Here is my another class 

public class DataBaseHelper extends SQLiteOpenHelper { 
    public static final String DATABSE_NAME = "foodDiary.db"; 
    public static final String TABLE_NAME = "fOOD_dIARY"; 
    public static final String Details = "Details"; 

    public static final String VALUE = "Value"; 

    public static final String ID = "ID"; 
    public static final String ITEM = "Item"; 
    public static final String MAX = "Max"; 
    public static final String USED = "Used"; 
    public static final String DATE = "Date"; 
    public static final String TIME = "Time"; 
    public static final String Quantity = "Time"; 
    SQLiteDatabase db = this.getWritableDatabase(); 

    private static final String CREATE_TABLE_TODO_TAG = "CREATE TABLE " 
      + TABLE_NAME + "(" + ID + " INTEGER PRIMARY KEY," 
      + ITEM + " TEXT," + MAX + " INTEGER," 
      + DATE + " TEXT," + TIME + " TEXT," 
      + USED + " INTEGER" + ")"; 

    private static final String CREATE_TABLE = "CREATE TABLE " 
      + Details + "(" + ID + " INTEGER PRIMARY KEY," 
      + DATE + " TEXT," + TIME + " TEXT," 
      + USED + " INTEGER" + ")"; 


    public DataBaseHelper(Context context) { 
     super(context, DATABSE_NAME, null, 1); 

    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     db.execSQL(CREATE_TABLE_TODO_TAG); 
     db.execSQL(CREATE_TABLE); 

    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     db.execSQL("DROP TABLE IF EXISTS" + TABLE_NAME); 
     db.execSQL("DROP TABLE IF EXISTS" + CREATE_TABLE); 
     onCreate(db); 
    } 
}

我不能更新我的插入查询数据库每当我点击提交按钮，它得到的表添加更新中，而不是数据库，我如何写一个更新查询，以便我可以用来更新数据库请提供一个适当的指导，因为我有搜索很多在谷歌，但不能够了解我有一个微调从我必须选择项目并在数据库中发送价值并希望更新这些值

来源

2017-09-22 Sushil

转到[此]（https://www.androidhive.info/2011/11/android-sqlite-database-tutorial）这里的链接是创建，插入，更新和删除sqllite的完整教程 – UltimateDevil

尝试此

public int UpdateIntodb(String oldValue, String newUsed) { 

    ContentValues cv = new ContentValues(); 
    cv.put(myDb.USED, newUsed); 
    return myDb.db.update(myDb.TABLE_NAME, cv, myDb.USED + "=" + oldValue, null); 
}

来源

2017-09-22 12:45:47 Journey

public void updateBanner(BannerMaster bannerMaster) { 
    database = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 

    values.put(TableBannerMaster.C01_BANNER_ID, bannerMaster.getBannerId()); 
    values.put(TableBannerMaster.C02_BANNER_NAME, bannerMaster.getBannerName()); 
    values.put(TableBannerMaster.C03_DISPLAY_ORDER, bannerMaster.getDisplayOrder()); 
    values.put(TableBannerMaster.C04_BANNER_URL, bannerMaster.getBannerUrl()); 
    values.put(TableBannerMaster.C05_APPLICABLE_IN, bannerMaster.getApplicableIn()); 
    values.put(TableBannerMaster.C06_BANNER_IMAGE, bannerMaster.getBannerImage()); 
    values.put(TableBannerMaster.C07_SHORT_DESC, bannerMaster.getShortDescription()); 
    values.put(TableBannerMaster.C09_BANNER_ADDED_ON, DateUtils.DateToString(bannerMaster.getAddedOn(), f)); 
    values.put(TableBannerMaster.C10_BANNER_UPDATE_ON, DateUtils.DateToString(bannerMaster.getUpdatedOn(), f)); 

    // Inserting Row 
    database.update(TableBannerMaster.TABLE_BANNER_MASTER, values, TableBannerMaster.C01_BANNER_ID + " = ?", new String[]{String.valueOf(bannerMaster.getBannerId())}); 
    database.close(); // Closing database connection 
}

样品更新查询

来源

2017-09-22 12:46:46

我怎么能火UpdateQuery在SQLite数据库

回答

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